The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
May. 18, 2009
Adela Goredema, Mississauga, CA;
C. Geoffrey Allen, Waterdown, CA;
Caroline M. Turek, Mississauga, CA;
Christopher Wagner, Toronto, CA;
Raymond Wong, Mississauga, CA;
Mihaela Maria Birau, Mississauga, CA;
Sheau Van Kao, Oakville, CA;
Adela Goredema, Mississauga, CA;
C. Geoffrey Allen, Waterdown, CA;
Caroline M. Turek, Mississauga, CA;
Christopher Wagner, Toronto, CA;
Raymond Wong, Mississauga, CA;
Mihaela Maria Birau, Mississauga, CA;
Sheau Van Kao, Oakville, CA;
Xerox Corporation, Norwalk, CT (US);
Abstract
A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein Ris an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, Ris an alkylene group, arylene group, alkylarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.